Optical aiming division precision adjusting mechanism in optical-mechanical system

Abstract

The invention provides an optical aiming division precision adjusting mechanism in an optical-mechanical system, relates to the field of optical aiming, and aims to solve the technical problems that a division piece adjusting mechanism in an aiming device is complex and difficult to miniaturize. The optical aiming division precision adjusting mechanism in the optical-mechanical system comprises a barrel, a division piece, a base and at least one adjusting mechanism, the division piece is arranged in the barrel, and the barrel and the adjusting mechanism are both arranged on the base; the adjusting mechanism comprises a force applying structure, and an elastic piece and an adjusting rod which are respectively positioned on two opposite sides of the dividing piece, and the force applying structure is used for enabling the adjusting rod to move in a preset direction; wherein the preset direction refers to the axial direction of the adjusting rod; the elastic piece is arranged between the dividing piece and the inner wall of the barrel, one end of the adjusting rod abuts against the dividing piece, and the other end of the adjusting rod penetrates through the barrel and the base to be connected with the force application structure. According to the optical aiming division precise adjustment mechanism in the optical-mechanical system, the adjustment accuracy and compactness of the division piece are improved.

Description

Technical Field

[0001] The present invention relates to the field of optical sighting technology, and in particular to an optical aiming scale precision adjustment mechanism in an optical machine system. Background Art

[0002] Optical sighting products have gradually evolved into integrated systems that integrate multiple optical paths, including white light, low-light, and lasers. A key challenge in these systems is calibrating the optical axes of these multiple light paths. These calibration methods often utilize optical reticle adjustment mechanisms to achieve optical axis alignment.

[0003] In the related art, the scale adjustment mechanism uses double slide rails (slide tables) to adjust the height and direction of the optical axis, but the structure is relatively complex and difficult to miniaturize. Summary of the Invention

[0004] The purpose of the present invention is to provide a precise adjustment mechanism for an optical aiming scale in an optical-mechanical system, so as to solve the technical problem that the adjustment structure of the scale member in the sighting device is complex and difficult to miniaturize.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides an optical aiming scale precision adjustment mechanism in an optical machine system, comprising a barrel, a scale element, a base, and at least one adjustment mechanism, wherein the scale element is arranged in the barrel, and the barrel and the adjustment mechanism are both arranged on the base;

[0007] The adjustment mechanism includes a force-applying structure, and elastic members and an adjustment rod respectively located on opposite sides of the dividing member, wherein the force-applying structure is used to move the adjustment rod in a preset direction; wherein the preset direction refers to the axial direction of the adjustment rod;

[0008] The elastic member is arranged between the dividing member and the inner wall of the cylinder. One end of the adjusting rod is stopped on the dividing member, and the other end passes through the cylinder, the base and is connected to the force-applying structure.

[0009] According to at least one embodiment of the present invention, the force-applying structure includes a force-applying member and a housing provided on the base, wherein the force-applying member includes a sleeve portion and a force-applying portion connected to each other;

[0010] The housing has a cavity, a first through hole for the adjustment rod to pass through, and a second through hole for the force-applying portion to pass through, and the sleeve portion is rotatably disposed in the cavity; in the preset direction, the first through hole and the second through hole are arranged in a direction away from the cylinder;

[0011] The sleeve portion has an internal thread, the adjusting rod has an external thread section that matches the internal thread, and the sleeve portion is threadedly connected to the external thread section.

[0012] According to at least one embodiment of the present invention, the cross-sections of the first via hole, the second via hole, and the cavity are all circular, and the diameters of the first via hole and the second via hole are both smaller than the diameter of the cavity; and / or,

[0013] The adjusting rod has a non-circular rod section, and the cylinder has a third through hole for the adjusting rod to pass through, and the third through hole is adapted to the rod section of the adjusting rod.

[0014] According to at least one embodiment of the present invention, the dividing member includes a dividing plate and a frame surrounding the dividing plate.

[0015] According to at least one embodiment of the present invention, the elastic member is an arc-shaped spring piece, the middle portion of the spring piece abuts against the inner wall of the cylinder, and both ends of the spring piece abut against the frame respectively.

[0016] According to at least one embodiment of the present invention, the frame has a first side surface, the first side surface is flat and abuts against the adjusting rod; and / or,

[0017] The frame has a second side surface opposite to the first side surface, the second side surface is a plane, and two ends of the elastic piece respectively abut against two sides of the second side surface of the frame in the circumferential direction.

[0018] According to at least one embodiment of the present invention, the middle portion of the elastic piece is fixed on the inner wall of the cylinder.

[0019] According to at least one embodiment of the present invention, the force applying structure further comprises a knob provided on the force applying portion, the knob being located outside the housing, and a groove being formed on an end surface of the knob facing the housing;

[0020] The force-applying structure further includes a disc spring sleeved on the force-applying portion, wherein one of a middle portion and an edge portion of the disc spring abuts against the shell, and the other abuts against the bottom wall of the groove.

[0021] According to at least one embodiment of the present invention, a first annular groove is formed on a portion of the force applying portion located within the second through hole, and the force applying structure further includes a first sealing ring provided in the first annular groove;

[0022] A second annular groove is formed on the end surface of the housing facing the knob, and the force-applying structure further includes a second sealing ring provided in the second annular groove.

[0023] According to at least one embodiment of the present invention, there are two adjustment mechanisms, and the axes of the adjustment rods in the two adjustment mechanisms are perpendicular to each other.

[0024] One or more technical solutions provided in the exemplary embodiments of the present invention can achieve at least one of the following beneficial effects.

[0025] In the optical-mechanical system of an exemplary embodiment of the present invention, the optical aiming reticle precision adjustment mechanism comprises an elastic member disposed between one side of the reticle and the inner wall of the barrel, and an adjustment rod disposed on the opposite side of the reticle. The adjustment rod is axially retractable on a base. The adjustment rod and the elastic member clamp together to maintain the reticle in a predetermined position within the barrel. To adjust the optical axis of the reticle, the length of the adjustment rod within the barrel and the deformation of the elastic member adjust the reticle's position within the barrel in a predetermined direction, thereby achieving alignment of the optical axis.

[0026] Compared with the prior art, which uses slide rails or slide tables to adjust the position of the scale, the slide rails or slide tables have complex structures, and are more difficult to install and adjust in a limited structural space, especially in an optical aiming scale precision adjustment mechanism in an optical mechanical system. The optical aiming scale precision adjustment mechanism in the optical mechanical system provided by the exemplary embodiment of the present invention uses an elastic member and an adjustment rod that can be retracted and extended in the barrel to complete adjustment in a preset direction, and the structure is simple and more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0028] Figure 1 is a schematic cross-sectional structural diagram of an adjustment mechanism according to an embodiment of the present invention;

[0029] Figure 2 2 is a schematic cross-sectional structural diagram of an adjustment mechanism according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 11. Adjusting rod; 111. Rod section; 112. Externally threaded section; 12. Force-applying member; 121. Sleeve portion; 122. Force-applying portion; 13. Knob; 14. Disc spring; 151. First sealing ring; 152. Second sealing ring; 16. Housing; 161. Cavity; 17. End cap; 171. First through hole;

[0032] 20. Graticule; 21. Graticule plate; 22. Frame; 221. First side surface; 222. Second side surface;

[0033] 30. Cylinder; 31. Positioning member;

[0034] 40. Elastic parts;

[0035] 50. Base. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] Before introducing the embodiments of the present invention, the following definitions are given for the relevant terms involved in the embodiments of the present invention:

[0038] A reticle (also called a crosshair plate or scale plate) is a thin, transparent sheet placed at the focal plane of an optical imaging system. It is inscribed with various precise lines or patterns (such as a double crosshair or single dot) using methods such as photolithography, chrome plating, photography, or vacuum deposition. The observer uses the overlap between the reticle and the target as the sole reference for aiming, ranging, and trajectory correction.

[0039] Backlash (also known as "lost stroke" or "backlash") refers to the phenomenon that when the direction of screw rotation changes, due to the gap between the thread mating surfaces, the screw must first idle for a certain angle before the nut starts to move in the opposite direction.

[0040] Figure 1 is a schematic cross-sectional structural diagram of an adjustment mechanism according to an embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the adjustment mechanism according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the optical aiming scale precision adjustment mechanism in the optical machine system provided by the exemplary embodiment of the present invention includes a barrel 30, a scale piece 20, a base 50 and at least one adjustment mechanism, the scale piece 20 is arranged in the barrel 30, and the barrel 30 and the adjustment mechanism are both arranged on the base 50; the adjustment mechanism includes a force-applying structure, and an elastic member 40 and an adjustment rod 11 respectively located on opposite sides of the scale piece 20, the force-applying structure is used to move the adjustment rod 11 in a preset direction; wherein the preset direction refers to: the axial direction of the adjustment rod 11; the elastic member 40 is arranged between the scale piece 20 and the inner wall of the barrel 30, one end of the adjustment rod 11 is stopped on the scale piece 20, and the other end passes through the barrel 30 and the base 50 and is connected to the force-applying structure.

[0041] In actual application, the dividing element 20 is set in the barrel 30 of the observation and aiming device. The barrel 30 is generally a circular barrel 30 (with a circular inner wall), or in other words, the dividing element 20 is generally a circular or substantially circular component. The engraved lines on the dividing element 20 are used to assist in observation and aiming. There is a certain gap between the circumferential side of the dividing element 20 and the inner wall of the barrel 30 to adjust the position of the dividing element 20 in the barrel 30, that is, to adjust the consistency of the optical axes of multiple light paths. An elastic member 40 is set between one side of the dividing element 20 and the inner wall of the barrel 30, and an adjustment rod 11 is set on the other side opposite the dividing element 20. The adjustment rod 11 is retractable in its axial direction on the base 50. Through the clamping action of the adjustment rod 11 and the elastic member 40, the dividing element 20 is maintained at a certain position in the barrel 30. When the optical axis of the dividing member 20 needs to be adjusted, the position of the dividing member 20 in the preset direction inside the barrel 30 can be adjusted by adjusting the length of the adjusting rod 11 in the barrel 30 and the deformation of the elastic member 40, thereby achieving adjustment of the optical axis.

[0042] Compared with the prior art, which uses a slide rail or a slide table to adjust the position of the scale 20, the slide rail or the slide table has a complex structure, and is particularly difficult to install and adjust in a limited structural space such as an optoelectronic sighting device. The optical aiming scale precision adjustment mechanism in the optical-mechanical system provided by the exemplary embodiment of the present invention uses an elastic member 40 and an adjustment rod 11 that can be retracted in the barrel 30 to complete adjustment in a preset direction, and has a simple and more compact structure.

[0043] Continue as Figure 1 As shown, in the optical aiming scale precision adjustment mechanism of the optical-mechanical system provided by the exemplary embodiment of the present invention, there are two adjustment mechanisms, and the axes of the adjustment rods 11 in the two adjustment mechanisms are perpendicular to each other.

[0044] In practical applications, based on the requirements of the optoelectronic sighting system, within the limited structural space, the reticle 20 needs to be adjusted in two directions: for example, one horizontal direction and the other vertical direction (elevation direction). Therefore, two adjustment mechanisms are provided in the optical sighting reticle precision adjustment mechanism of the optomechanical system to retain the reticle 20 within the barrel 30. The axial directions of the adjustment rods 11 in these two adjustment mechanisms are one horizontal direction and the other vertical direction.

[0045] For example, Figure 1As shown, the base 50 comprises two plate-like structures arranged in an L-shape (90°), with the force-applying structures of the two adjustment mechanisms disposed on the two plate-like structures, respectively. The barrel 30 is disposed inside the L-shaped base 50 and fixedly connected to the base 50. The horizontal position of the scale element 20 within the barrel 30 can be adjusted by adjusting the adjustment mechanism located in the horizontal direction (e.g., located on the right side of the barrel 30), while the vertical position of the scale element 20 within the barrel 30 can be adjusted by adjusting the adjustment mechanism located in the vertical direction (e.g., located below the barrel 30).

[0046] The above-mentioned two adjustment mechanisms are arranged roughly along the circumference of the cylinder 30, which can make the structure more compact, occupy less space, and the two do not interfere with each other, and the reliability is higher; while the existing technology uses slide rails or slides to adjust the dividing member 20 in two directions, which requires one slide to be superimposed on another slide to achieve, and the structure is more complex, the size is larger, and the reliability will be correspondingly reduced.

[0047] like Figure 2 As shown, in the optical aiming and dividing precision adjustment mechanism of the optical-mechanical system provided by an exemplary embodiment of the present invention, the force-applying structure includes a force-applying member 12 and a shell 16 provided on the base 50, the force-applying member 12 has a connected sleeve portion 121 and a force-applying portion 122; the shell 16 has a cavity 161, a first through hole 171 for the adjustment rod 11 to pass through, and a second through hole for the force-applying portion 122 to pass through, the sleeve portion 121 is rotatably arranged in the cavity 161; in a preset direction, the first through hole 171 and the second through hole are arranged along a direction away from the cylinder 30; the sleeve portion 121 has an internal thread, and the end of the adjustment rod 11 away from the dividing member 20 has an external thread that cooperates with the internal thread, and the sleeve portion 121 is threadedly connected to the adjustment rod 11.

[0048] Exemplarily, cross sections of the first via hole 171 , the second via hole, and the cavity 161 are all circular, and diameters of the first via hole 171 and the second via hole are both smaller than the diameter of the cavity 161 .

[0049] In actual application, the housing 16 is detachably mounted on the outside of the base 50 by means of screws and other components, that is, on the side of the plate-like structure of the base 50 facing away from the barrel 30. The sleeve portion 121 of the adjustment rod 11 is rotatably mounted in the cavity 161. The sleeve portion 121 is adapted to fit within the cavity 161. The diameter of the sleeve portion 121 is larger than the adjustment rod 11 and the force-applying portion 122. The adjustment rod 11 has an externally threaded external threaded section 112 that is threadedly connected to the internal thread of the sleeve portion 121. The sleeve portion 121 can be considered a nut with a closed end face. The adjustment rod 11 passes through the first through-hole 171 and the wall of the barrel 30, and then abuts against the dividing member 20. The force-applying member 12 passes through the second through-hole and extends to the outside of the housing 16 for easy operation by an observer.

[0050] When the observer rotates the force-applying member 12, the sleeve portion 121 rotates, driving the adjustment rod 11 to move inward or outward of the barrel 30 in its axial direction. For example, when adjusting the horizontal position of the scale element 20 within the barrel 30, the sleeve portion 121 rotates, driving the adjustment rod 11 inward of the barrel 30. The scale element 20 squeezes the corresponding elastic member 40, causing it to deform and move toward the elastic member 40. When the sleeve portion 121 rotates in the opposite direction, driving the adjustment rod 11 outward of the barrel 30, the scale element 20, under the action of the elastic member 40 recovering from its deformation, moves the scale element 20 away from the elastic member 40.

[0051] By selecting the appropriate pitch and length of the internal threads of the sleeve portion 121 and the external threads of the external threaded section 112 according to actual needs, the required adjustment range can be achieved, allowing for micro-adjustments. By rotating the elastic member 40 and the sleeve portion 121 and extending and retracting the adjustment rod 11, circular motion is converted into linear motion, allowing the position of the divider 20 to be adjusted in two mutually perpendicular directions without affecting each other. It is understood that the adjustment displacement of the divider 20 is minimal, meaning that the gap between the divider 20 and the inner wall of the cylinder 30 is also small, sufficient to maintain the stability of the elastic member 40 within the cylinder 30.

[0052] In some embodiments, as Figure 2 As shown, in addition to the main body, the shell 16 also includes an end cover 17 covering the opening of the cavity 161, which is fixed to the shell 16 by screws to form a part of the shell 16. A first through hole 171 is formed on the end cover 17, so that the end cover 17 and the main body of the shell 16 form a relatively closed cavity 161 for the sleeve portion 121 to rotate therein and form a threaded connection with the external threaded section 112 of the adjusting rod 11. It can be understood that the diameter of the first through hole 171 is smaller than the diameter of the external threaded section 112 of the adjusting rod 11, so as to form an axial limit for the adjusting rod 11.

[0053] Exemplarily, the cylinder 30 has a third through hole for the adjusting rod 11 to pass through, and the third through hole is adapted to the non-circular rod segment 111 of the adjusting rod 11. For example, the rod segment 111 is a quasi-circular rod structure with two tangent planes, and the shape of the third through hole is also a quasi-circular structure with two tangent planes, thereby forming a circumferential limit for the adjusting rod 11 to prevent it from rotating but allowing it to move axially.

[0054] Optionally, a baffle is further provided on the side of the end cover 17 facing the cylinder 30, which closes the first through hole 171, and a through hole is formed on the baffle for the rod segment 111 of the adjusting rod 11 to pass through (compatible with the non-circular rod segment 111). The baffle can form a relatively closed and stable environment for the cavity 161 to meet the use requirements; at the same time, the non-circular through hole on the baffle can also form a circumferential limit for the adjusting rod 11 to prevent it from rotating; and then cooperate with the third through hole on the cylinder 30 to limit the circumferential rotation of the adjusting rod 11, thereby increasing the reliability of the adjustment mechanism.

[0055] Exemplarily, the adjusting rod 11 also has a transition section 113 located between the external thread section 112 and the rod section 111. The cross-section of the transition section 133 can be circular, and it can be movably arranged in the first through hole 171. The diameter of the transition section is larger than the diameter of the rod section 111 and smaller than the diameter of the external thread section 112, and its length is equal to the length of the first through hole 171.

[0056] like Figure 1 As shown, the dividing member 20 provided by the exemplary embodiment of the present invention includes a dividing plate 21 and a frame 22 arranged around the dividing plate 21 .

[0057] The graticule 21 is a circular glass plate with two intersecting engraved lines at its center for indicating a reference point. The graticule 21 is embedded in a frame 22 for protection.

[0058] Exemplarily, the frame 22 has a first side surface 221, which is a plane and abuts against the adjusting rod 11; the frame 22 has a second side surface 222 opposite to the first side surface 221, which is a plane, and the two ends of the spring respectively abut against the two sides of the second side surface 222 of the frame 22 in the circumferential direction.

[0059] It is understood that the frame 22 has two first side surfaces 221 and two second side surfaces 222, both of which are planar, while the rest of the periphery of the frame 22 is arc-shaped. The two first side surfaces 221 provide a stop surface for the corresponding adjustment rod 11, while the two second side surfaces 222 provide space for the corresponding elastic member 40 to deform. It is understood that the area of ​​the first side surfaces 221 is larger than the area of ​​the end surface of the rod segment 111 of the adjustment rod 11.

[0060] Exemplarily, the elastic member 40 is an arc-shaped spring piece, the middle portion of the spring piece abuts against the inner wall of the cylinder 30 , and both ends of the spring piece abut against the frame 22 .

[0061] A central portion of the spring clip can be attached to the inner wall of the barrel 30 to provide stable support, while the ends abut against the curved structures on either side of the corresponding second side surface 222 of the frame 22. When the spring clip is compressed and deformed, its ends can slide on the curved structures of the frame 22. It can be understood that even a slight deformation of the spring clip can achieve the purpose of multi-path optical axis adjustment of the reticle 21, and the spring clip can be freely positioned in the gap between the inner wall of the barrel 30 and the frame 22.

[0062] In other embodiments, the middle portion of the spring piece can be fixed to the inner wall of the cylinder 30 by welding or screw connection to maintain stability and reliability during the deformation process.

[0063] like Figure 1 As shown, the sighting device provided by the exemplary embodiment of the present invention further includes a positioning member 31 detachably provided on the barrel 30 , and the positioning member 31 is used to limit the axial direction of the dividing member 20 .

[0064] One end of the positioning member 31 is detachably mounted on the barrel 30, and the other end is attached to a surface of the frame 22. The barrel 30 also has a limiting surface opposite the positioning member 31, which limits the axial position of the dividing element 20 from both sides, ensuring that the dividing element 20 slides smoothly and seamlessly within the barrel 30, resulting in no axial play within the barrel 30. It will be understood that the thickness of the positioning member 31 can be ground to a suitable thickness based on the depth of the limiting surface within the barrel 30 and the thickness of the frame 22, thereby ensuring the stability of the dividing element 20 within the barrel 30.

[0065] like Figure 2 As shown, the sighting device provided by the exemplary embodiment of the present invention, the force-applying structure also includes a knob 13 provided on the force-applying portion 122, the knob 13 is located outside the shell 16, and a groove is formed on the end surface of the knob 13 facing the shell 16; the force-applying structure also includes a disc spring 14 sleeved on the force-applying portion 122, one of the middle portion and the edge portion of the disc spring 14 abuts against the shell 16, and the other abuts against the bottom wall of the groove.

[0066] In actual application, the knob 13 is fixed by a pin to the portion of the force-applying portion 122 located outside the housing 16. By rotating the knob 13, the sleeve portion 121 can drive the adjusting rod 11 to move linearly toward or away from the first side surface 221. When a groove for accommodating the disc spring 14 is provided on the end face of the knob 13, the end face of the knob 13 fits against the housing 16, and the disc spring 14 is sleeved on the force-applying portion 122 and arranged in the groove. For example, the middle portion of the disc spring 14 abuts against the periphery of the second through hole, and the peripheral edge portion abuts against the bottom wall of the groove. The elastic deformation of the above-mentioned disc spring 14 can eliminate the movement gap and backlash between the sleeve portion 121 and the external threaded section 112 of the adjusting rod 11, thereby ensuring the position accuracy of the dividing member 20 during the adjustment process.

[0067] Continue as Figure 2 As shown, in the sighting device provided by the exemplary embodiment of the present invention, a first annular groove is formed on the portion of the force-applying portion 122 located in the second through hole, and the force-applying structure further includes a first sealing ring 151 provided in the first annular groove; a second annular groove is formed on the end surface of the housing 16 facing the knob 13, and the force-applying structure further includes a second sealing ring 152 provided in the second annular groove.

[0068] In actual applications, the force-applying portion 122 can be sealed and connected to the second through-hole through the first sealing ring 151, and the knob 13 and the housing 16 can also be sealed and connected through the second sealing ring 152. The above-mentioned sealing connection method can ensure the sealing inside the adjustment mechanism and meet the requirements of the use environment of the sighting device, such as waterproof and dustproof.

[0069] In some embodiments, the various components of the adjustment mechanism can be fabricated from common materials such as aluminum and round steel for ease of fabrication. The overall structure has been experimentally verified to meet the requirements for precise and stable adjustment, with an adjustment range of ±10 mil and an accuracy of 0.1 mil, meeting the requirements for optical axis calibration in optoelectronic products. The reticle has been tested for high and low temperatures, shock, and vibration, demonstrating stable adjustment, with an optical axis deviation of no more than 0.2 mil. The adjustment mechanism can be installed as a standalone unit in the corresponding optoelectronic system via screws, ensuring ease of installation, reliability, and a compact structure.

[0070] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present invention.

Claims

1. An optical aiming scale precision adjustment mechanism in an optical-mechanical system, characterized in that: It comprises a barrel, a dividing member, a base and at least one adjusting mechanism, wherein the dividing member is arranged in the barrel, and the barrel and the adjusting mechanism are both arranged on the base; The adjustment mechanism includes a force-applying structure, and elastic members and an adjustment rod respectively located on opposite sides of the dividing member, wherein the force-applying structure is used to move the adjustment rod in a preset direction; wherein the preset direction refers to the axial direction of the adjustment rod; The elastic member is arranged between the dividing member and the inner wall of the cylinder. One end of the adjusting rod is abutted against the dividing member and the other end passes through the cylinder. The base is connected to the force-applying structure.

2. The adjustment mechanism according to claim 1, characterized in that: The force-applying structure includes a force-applying member and a shell provided on the base, wherein the force-applying member includes a sleeve portion and a force-applying portion connected to each other; The sleeve portion has an internal thread, the adjusting rod has an external thread section that matches the internal thread, and the sleeve portion is threadedly connected to the external thread section.

3. The adjustment mechanism according to claim 2, characterized in that: The dividing component includes a dividing plate and a frame arranged around the dividing plate.

4. The adjustment mechanism according to claim 3, characterized in that: The elastic member is an arc-shaped spring piece, the middle portion of the spring piece abuts against the inner wall of the cylinder, and both ends of the spring piece abut against the frame respectively.

5. The adjustment mechanism according to claim 4, characterized in that: The frame has a first side surface, which is a plane and abuts against the adjusting rod.

6. The adjustment mechanism according to claim 5, characterized in that: The frame has a second side surface opposite to the first side surface, the second side surface is a plane, and two ends of the elastic piece respectively abut against two sides of the second side surface of the frame in the circumferential direction.

7. The adjustment mechanism according to claim 5, characterized in that: The middle part of the elastic piece is fixed on the inner wall of the cylinder.

8. The adjustment mechanism according to claim 5, characterized in that: The force applying structure further includes a knob provided on the force applying portion.

9. The adjustment mechanism according to claim 8, characterized in that: The knob is located outside the shell, and a groove is formed on the end surface of the knob facing the shell.

10. The adjustment mechanism according to any one of claims 1 to 9, characterized in that: The number of the adjustment mechanisms is two.

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